/**
* Generate a new MWK
*
* @param desBytes byte array of the DES key (24 bytes)
* @return Hex String of the new encrypted MWK ready for transmission to ValueLink
*/
public byte[] generateMwk(byte[] desBytes) {
if (debug) {
Debug.logInfo(
"DES Key : " + StringUtil.toHexString(desBytes) + " / " + desBytes.length, module);
}
SecretKeyFactory skf1 = null;
SecretKey mwk = null;
try {
skf1 = SecretKeyFactory.getInstance("DESede");
} catch (NoSuchAlgorithmException e) {
Debug.logError(e, module);
}
DESedeKeySpec desedeSpec2 = null;
try {
desedeSpec2 = new DESedeKeySpec(desBytes);
} catch (InvalidKeyException e) {
Debug.logError(e, module);
}
if (skf1 != null && desedeSpec2 != null) {
try {
mwk = skf1.generateSecret(desedeSpec2);
} catch (InvalidKeySpecException e) {
Debug.logError(e, module);
}
}
if (mwk != null) {
return generateMwk(mwk);
} else {
return null;
}
}
protected SecretKey getDesEdeKey(byte[] rawKey) {
SecretKeyFactory skf = null;
try {
skf = SecretKeyFactory.getInstance("DESede");
} catch (NoSuchAlgorithmException e) {
// should never happen since DESede is a standard algorithm
Debug.logError(e, module);
return null;
}
// load the raw key
if (rawKey.length > 0) {
DESedeKeySpec desedeSpec1 = null;
try {
desedeSpec1 = new DESedeKeySpec(rawKey);
} catch (InvalidKeyException e) {
Debug.logError(e, "Not a valid DESede key", module);
return null;
}
// create the SecretKey Object
SecretKey key = null;
try {
key = skf.generateSecret(desedeSpec1);
} catch (InvalidKeySpecException e) {
Debug.logError(e, module);
}
return key;
} else {
throw new RuntimeException("No valid DESede key available");
}
}
public static String decryptIt(String value) {
try {
DESKeySpec keySpec = new DESKeySpec(cryptoPass.getBytes("UTF8"));
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
SecretKey key = keyFactory.generateSecret(keySpec);
byte[] encrypedPwdBytes = Base64.decode(value, Base64.DEFAULT);
// cipher is not thread safe
Cipher cipher = Cipher.getInstance("DES");
cipher.init(Cipher.DECRYPT_MODE, key);
byte[] decrypedValueBytes = (cipher.doFinal(encrypedPwdBytes));
String decrypedValue = new String(decrypedValueBytes);
Log.d(TAG, "Decrypted: " + value + " -> " + decrypedValue);
return decrypedValue;
} catch (InvalidKeyException e) {
e.printStackTrace();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (InvalidKeySpecException e) {
e.printStackTrace();
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
} catch (BadPaddingException e) {
e.printStackTrace();
} catch (NoSuchPaddingException e) {
e.printStackTrace();
} catch (IllegalBlockSizeException e) {
e.printStackTrace();
}
return value;
}
/**
* This method helps in decrypting the password
*
* @param property
* @return
* @throws GeneralSecurityException
* @throws IOException
*/
public static String decrypt(String property) throws GeneralSecurityException, IOException {
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("PBEWithMD5AndDES");
SecretKey key = keyFactory.generateSecret(new PBEKeySpec(PASSWORD));
Cipher pbeCipher = Cipher.getInstance("PBEWithMD5AndDES");
pbeCipher.init(Cipher.DECRYPT_MODE, key, new PBEParameterSpec(SALT, 20));
return new String(pbeCipher.doFinal(base64Decode(property)));
}
/**
* 转换密钥
*
* @param password
* @return
* @throws NoSuchAlgorithmException
* @throws InvalidKeySpecException
*/
public static Key toKey(String password)
throws NoSuchAlgorithmException, InvalidKeySpecException {
PBEKeySpec keySpec = new PBEKeySpec(password.toCharArray());
SecretKeyFactory factory = SecretKeyFactory.getInstance(ALGORITHM);
SecretKey key = factory.generateSecret(keySpec);
return key;
}
public static String encrypt(String property) throws GeneralSecurityException {
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("PBEWithMD5AndDES");
SecretKey key = keyFactory.generateSecret(new PBEKeySpec(getPassword()));
Cipher pbeCipher = Cipher.getInstance("PBEWithMD5AndDES");
pbeCipher.init(Cipher.ENCRYPT_MODE, key, new PBEParameterSpec(SALT, 20));
return ENCODING_MODE_1 + base64Encode(pbeCipher.doFinal(property.getBytes()));
}
/**
* @param s
* @return
* @throws GeneralSecurityException
* @throws UnsupportedEncodingException
*/
public static String decrypt(final String s)
throws GeneralSecurityException, UnsupportedEncodingException {
String decrypted = null;
try {
if (s != null) {
final SecretKeyFactory secretKeyFactory = SecretKeyFactory.getInstance("PBEWithMD5AndDES");
final SecretKey secretKey =
secretKeyFactory.generateSecret(new PBEKeySpec(secret.toCharArray()));
final Cipher cipher = Cipher.getInstance("PBEWithMD5AndDES");
cipher.init(Cipher.DECRYPT_MODE, secretKey, new PBEParameterSpec(SALT, 20));
final byte[] stringBytes = s.getBytes("UTF-8");
final byte[] decodedBytes = Base64.decode(stringBytes, Base64.DEFAULT);
final byte[] decryptedBytes = cipher.doFinal(decodedBytes);
decrypted = new String(decryptedBytes, "UTF-8");
}
} catch (GeneralSecurityException x) {
throw x;
} catch (UnsupportedEncodingException x) {
throw x;
} catch (Exception x) {
DBG.m(x);
}
return decrypted;
}
// Creates a PBKDF2 hash of the password string using the random salted
// provided
private byte[] pbkdf2(char[] password, byte[] salt, int iterations, int bytes)
throws NoSuchAlgorithmException, InvalidKeySpecException {
PBEKeySpec spec = new PBEKeySpec(password, salt, iterations, bytes * 8);
SecretKeyFactory skf = SecretKeyFactory.getInstance(ReadProperties.getProperty("pbkdf2_algo"));
return skf.generateSecret(spec).getEncoded();
}
/**
* 转换密钥<br>
*
* @param password
* @return
* @throws Exception
*/
private static Key toKey(String password) throws Exception {
PBEKeySpec keySpec = new PBEKeySpec(password.toCharArray());
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(ALGORITHM);
SecretKey secretKey = keyFactory.generateSecret(keySpec);
return secretKey;
}
public static void main(String args[]) throws Exception {
byte key[] = password.getBytes();
DESKeySpec desKeySpec = new DESKeySpec(key);
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
SecretKey secretKey = keyFactory.generateSecret(desKeySpec);
// Create cipher mode
Cipher desCipher = Cipher.getInstance("DES/ECB/PKCS5Padding");
desCipher.init(Cipher.DECRYPT_MODE, secretKey);
// Create stream
FileInputStream fis = new FileInputStream("out.txt");
BufferedInputStream bis = new BufferedInputStream(fis);
CipherInputStream cis = new CipherInputStream(bis, desCipher);
ObjectInputStream ois = new ObjectInputStream(cis);
// Read
String plaintext2 = ois.readUTF();
ois.close();
// Compare
System.out.println(plaintext);
System.out.println(plaintext2);
System.out.println("Identical? " + (plaintext.equals(plaintext2)));
}
private void testCipherNameWithWrap(String name, String simpleName) throws Exception {
KeyGenerator kg = KeyGenerator.getInstance("AES");
kg.init(new SecureRandom());
SecretKey key = kg.generateKey();
byte[] salt = {
(byte) 0xc7, (byte) 0x73, (byte) 0x21, (byte) 0x8c,
(byte) 0x7e, (byte) 0xc8, (byte) 0xee, (byte) 0x99
};
char[] password = {'p', 'a', 's', 's', 'w', 'o', 'r', 'd'};
PBEParameterSpec pbeParamSpec = new PBEParameterSpec(salt, 20);
PBEKeySpec pbeKeySpec = new PBEKeySpec(password);
SecretKeyFactory keyFac = SecretKeyFactory.getInstance(name);
SecretKey pbeKey = keyFac.generateSecret(pbeKeySpec);
Cipher pbeEncryptCipher = Cipher.getInstance(name, "SC");
pbeEncryptCipher.init(Cipher.WRAP_MODE, pbeKey, pbeParamSpec);
byte[] symKeyBytes = pbeEncryptCipher.wrap(key);
Cipher simpleCipher = Cipher.getInstance(simpleName, "SC");
simpleCipher.init(Cipher.UNWRAP_MODE, pbeKey, pbeParamSpec);
SecretKey unwrappedKey = (SecretKey) simpleCipher.unwrap(symKeyBytes, "AES", Cipher.SECRET_KEY);
if (!Arrays.areEqual(unwrappedKey.getEncoded(), key.getEncoded())) {
fail("key mismatch on unwrapping");
}
}
/**
* Get a hashed password ready for storage or comparison.
*
* @param password The password to hash
* @param NaCl The salt to use in the hashing process
* @return A string array with the password in the 0 position and the salt in the 1 position
*/
private static String[] getSecurePassword(String password, String NaCl) {
int iterations = 1000;
char[] chars = password.toCharArray();
System.out.println("-----------------------------------------");
System.out.println(NaCl);
byte[] salt = NaCl.getBytes();
PBEKeySpec spec = new PBEKeySpec(chars, salt, iterations, 64 * 8);
SecretKeyFactory skf;
byte[] hash = null;
try {
skf = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA512");
hash = skf.generateSecret(spec).getEncoded();
} catch (NoSuchAlgorithmException | InvalidKeySpecException e) {
e.printStackTrace();
}
String[] ret = new String[0];
try {
ret = new String[] {(new String(hash, "UTF-8")), (new String(salt, "UTF-8"))};
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
return ret;
}
public static String encrypt(String property) throws GeneralSecurityException {
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(encrypteAlgorithm);
SecretKey key = keyFactory.generateSecret(new PBEKeySpec(PASSWORD));
Cipher pbeCipher = Cipher.getInstance(encrypteAlgorithm);
pbeCipher.init(Cipher.ENCRYPT_MODE, key, new PBEParameterSpec(SALT, 20));
return base64Encode(pbeCipher.doFinal(property.getBytes()));
}
/**
* A function that generates password-based AES & HMAC keys. It prints out exceptions but doesn't
* throw them since none should be encountered. If they are encountered, the return value is null.
*
* @param password The password to derive the keys from.
* @return The AES & HMAC keys.
* @throws GeneralSecurityException if AES is not implemented on this system, or a suitable RNG is
* not available
*/
public static SecretKeys generateKeyFromPassword(String password, byte[] salt)
throws GeneralSecurityException {
fixPrng();
// Get enough random bytes for both the AES key and the HMAC key:
KeySpec keySpec =
new PBEKeySpec(
password.toCharArray(),
salt,
PBE_ITERATION_COUNT,
AES_KEY_LENGTH_BITS + HMAC_KEY_LENGTH_BITS);
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(PBE_ALGORITHM);
byte[] keyBytes = keyFactory.generateSecret(keySpec).getEncoded();
// Split the random bytes into two parts:
byte[] confidentialityKeyBytes = copyOfRange(keyBytes, 0, AES_KEY_LENGTH_BITS / 8);
byte[] integrityKeyBytes =
copyOfRange(
keyBytes, AES_KEY_LENGTH_BITS / 8, AES_KEY_LENGTH_BITS / 8 + HMAC_KEY_LENGTH_BITS / 8);
// Generate the AES key
SecretKey confidentialityKey = new SecretKeySpec(confidentialityKeyBytes, CIPHER);
// Generate the HMAC key
SecretKey integrityKey = new SecretKeySpec(integrityKeyBytes, HMAC_ALGORITHM);
return new SecretKeys(confidentialityKey, integrityKey);
}
private static void bcDES() throws Exception {
Security.addProvider(new BouncyCastleProvider());
// Key convert
DESKeySpec desKeySpec = new DESKeySpec(bytesKey);
SecretKeyFactory factory = SecretKeyFactory.getInstance("DES", "BC");
SecretKey desKey = factory.generateSecret(desKeySpec);
Cipher cipher = Cipher.getInstance("DES/ECB/PKCS5Padding");
cipher.init(Cipher.ENCRYPT_MODE, desKey);
System.out.println("BC" + cipher.getProvider());
byte[] result = cipher.doFinal("ABC".getBytes());
String hexResult = Hex.encodeHexString(result);
System.out.println(hexResult);
cipher.init(Cipher.DECRYPT_MODE, desKey);
result =
cipher.doFinal(
Hex.decodeHex(hexResult.toCharArray())
// result
);
System.out.println(new String(result));
}
/**
* Encode password using DES encryption with given challenge.
*
* @param challenge a random set of bytes.
* @param password a password
* @return DES hash of password and challenge
*/
public ByteBuffer encodePassword(ByteBuffer challenge, String password) {
if (challenge.length != 16)
throw new RuntimeException("Challenge must be exactly 16 bytes long.");
// VNC password consist of up to eight ASCII characters.
byte[] key = {0, 0, 0, 0, 0, 0, 0, 0}; // Padding
byte[] passwordAsciiBytes = password.getBytes(RfbConstants.US_ASCII_CHARSET);
System.arraycopy(passwordAsciiBytes, 0, key, 0, Math.min(password.length(), 8));
// Flip bytes (reverse bits) in key
for (int i = 0; i < key.length; i++) {
key[i] = flipByte(key[i]);
}
try {
KeySpec desKeySpec = new DESKeySpec(key);
SecretKeyFactory secretKeyFactory = SecretKeyFactory.getInstance("DES");
SecretKey secretKey = secretKeyFactory.generateSecret(desKeySpec);
Cipher cipher = Cipher.getInstance("DES/ECB/NoPadding");
cipher.init(Cipher.ENCRYPT_MODE, secretKey);
ByteBuffer buf =
new ByteBuffer(cipher.doFinal(challenge.data, challenge.offset, challenge.length));
return buf;
} catch (Exception e) {
throw new RuntimeException("Cannot encode password.", e);
}
}
public static byte[] decrypt(PrivateKey privKey, Message message) throws CryptoException {
try {
Cipher rsaCipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");
rsaCipher.init(Cipher.DECRYPT_MODE, privKey);
byte[] secretKeyBytes = rsaCipher.doFinal(message.sessionKey);
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("AES");
KeySpec ks = new SecretKeySpec(secretKeyBytes, "AES");
SecretKey secretKey = keyFactory.generateSecret(ks);
Cipher aesCipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
aesCipher.init(Cipher.DECRYPT_MODE, secretKey, new IvParameterSpec(message.iv));
byte[] messageBytes = aesCipher.doFinal(message.ciphertext);
return messageBytes;
} catch (NoSuchAlgorithmException
| NoSuchPaddingException
| InvalidKeyException
| IllegalBlockSizeException
| BadPaddingException
| InvalidKeySpecException
| InvalidAlgorithmParameterException e) {
throw new CryptoException(e);
}
}
public static String encrypt(String originalText, String password) {
String enc = "";
try {
// cara penggunaan JCE u/ melakukan enkripsi berdasarkan metode enkripsi PBE, yg dipilih
// (tidak
// mesti PBEWithMD5AndDES
PBEKeySpec keySpec = new PBEKeySpec(password.toCharArray());
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(METHOD);
SecretKey secretKey = keyFactory.generateSecret(keySpec);
PBEParameterSpec parameterSpec = new PBEParameterSpec(salt, iterationCount);
cipher = Cipher.getInstance(METHOD);
cipher.init(Cipher.ENCRYPT_MODE, secretKey, parameterSpec);
outputArray = originalText.getBytes(encoding);
cryptedText = new ByteArrayOutputStream();
CipherOutputStream out = new CipherOutputStream(cryptedText, cipher);
out.write(outputArray);
out.flush();
out.close();
return cryptedText.toString();
} catch (IOException ex) {
Logger.getLogger(EncDec.class.getName()).log(Level.SEVERE, null, ex);
} catch (InvalidKeyException ex) {
Logger.getLogger(EncDec.class.getName()).log(Level.SEVERE, null, ex);
} catch (InvalidAlgorithmParameterException ex) {
Logger.getLogger(EncDec.class.getName()).log(Level.SEVERE, null, ex);
} catch (NoSuchPaddingException ex) {
Logger.getLogger(EncDec.class.getName()).log(Level.SEVERE, null, ex);
} catch (InvalidKeySpecException ex) {
Logger.getLogger(EncDec.class.getName()).log(Level.SEVERE, null, ex);
} catch (NoSuchAlgorithmException ex) {
Logger.getLogger(EncDec.class.getName()).log(Level.SEVERE, null, ex);
}
return "error";
}
/**
* Decrypt an encrypted PKCS 8 format private key.
*
* <p>Based on ghstark's post on Aug 6, 2006 at
* http://forums.sun.com/thread.jspa?threadID=758133&messageID=4330949
*
* @param encryptedPrivateKey The raw data of the private key
* @param keyFile The file containing the private key
*/
private KeySpec decryptPrivateKey(byte[] encryptedPrivateKey, String keyPassword)
throws GeneralSecurityException {
EncryptedPrivateKeyInfo epkInfo;
try {
epkInfo = new EncryptedPrivateKeyInfo(encryptedPrivateKey);
} catch (IOException ex) {
// Probably not an encrypted key.
return null;
}
char[] keyPasswd = keyPassword.toCharArray();
SecretKeyFactory skFactory = SecretKeyFactory.getInstance(epkInfo.getAlgName());
Key key = skFactory.generateSecret(new PBEKeySpec(keyPasswd));
Cipher cipher = Cipher.getInstance(epkInfo.getAlgName());
cipher.init(Cipher.DECRYPT_MODE, key, epkInfo.getAlgParameters());
try {
return epkInfo.getKeySpec(cipher);
} catch (InvalidKeySpecException ex) {
getLogger().error("signapk: Password for private key may be bad.");
throw ex;
}
}
public static final void main(String[] args) throws Exception {
// Generate a PBE key
SecretKeyFactory skFac = SecretKeyFactory.getInstance("PBE");
SecretKey skey = skFac.generateSecret(new PBEKeySpec("test123".toCharArray()));
// Initialize the PBE cipher
Cipher cipher = Cipher.getInstance(ALGO);
cipher.init(Cipher.ENCRYPT_MODE, skey);
// Permit access to the Cipher.spi field (a CipherSpi object)
Field spi = Cipher.class.getDeclaredField("spi");
spi.setAccessible(true);
Object value = spi.get(cipher);
// Permit access to the CipherSpi.engineGetKeySize method
Method engineGetKeySize =
PKCS12PBECipherCore$PBEWithSHA1AndDESede.class.getDeclaredMethod(
"engineGetKeySize", Key.class);
engineGetKeySize.setAccessible(true);
// Check the key size
int keySize = (int) engineGetKeySize.invoke(value, skey);
if (keySize == KEYSIZE) {
System.out.println(ALGO + ".engineGetKeySize returns " + keySize + " bits, as expected");
System.out.println("OK");
} else {
throw new Exception("ERROR: " + ALGO + " key size is incorrect");
}
}
private static int generateIterationCount(String passphrase, byte[] salt) {
int TARGET_ITERATION_TIME = 50; // ms
int MINIMUM_ITERATION_COUNT = 100; // default for low-end devices
int BENCHMARK_ITERATION_COUNT = 10000; // baseline starting iteration count
try {
PBEKeySpec keyspec =
new PBEKeySpec(passphrase.toCharArray(), salt, BENCHMARK_ITERATION_COUNT);
SecretKeyFactory skf = SecretKeyFactory.getInstance("PBEWITHSHA1AND128BITAES-CBC-BC");
long startTime = System.currentTimeMillis();
skf.generateSecret(keyspec);
long finishTime = System.currentTimeMillis();
int scaledIterationTarget =
(int)
(((double) BENCHMARK_ITERATION_COUNT / (double) (finishTime - startTime))
* TARGET_ITERATION_TIME);
if (scaledIterationTarget < MINIMUM_ITERATION_COUNT) return MINIMUM_ITERATION_COUNT;
else return scaledIterationTarget;
} catch (NoSuchAlgorithmException e) {
Log.w("MasterSecretUtil", e);
return MINIMUM_ITERATION_COUNT;
} catch (InvalidKeySpecException e) {
Log.w("MasterSecretUtil", e);
return MINIMUM_ITERATION_COUNT;
}
}
/**
* Method TDESECB.
*
* @param plaintext byte[]
* @param key byte[]
* @param opmode int
* @return byte[]
*/
public static byte[] TDESECB(byte[] plaintext, byte[] key, int opmode) {
byte[] ciphertext = null;
try {
// 2KTDEA key is encountered, expand to 192 bit
byte[] _key;
if (key.length == 16) {
if (debug) {
System.out.println("Expanding from 128 to 192");
}
byte[] ekey = new byte[24];
System.arraycopy(key, 0, ekey, 0, key.length);
System.arraycopy(key, 0, ekey, key.length, key.length / 2);
_key = ekey;
} else {
_key = key;
}
if (debug) {
System.out.println("Key: " + DataUtil.byteArrayToString(_key));
}
DESedeKeySpec ks = new DESedeKeySpec(_key);
SecretKeyFactory kf = SecretKeyFactory.getInstance("DESede");
SecretKey sk = kf.generateSecret(ks);
Cipher c = Cipher.getInstance("DESede/ECB/NoPadding");
c.init(opmode, sk);
ciphertext = c.doFinal(plaintext);
} catch (Throwable e) {
e.printStackTrace();
}
return ciphertext;
}
/**
* Loads the PBE secret key.
*
* @throws Exception if an error ocurrs when loading the PBE key.
*/
private void loadPBESecretKey() throws Exception {
// Create the PBE secret key
cipherSpec = new PBEParameterSpec(salt, iterationCount);
PBEKeySpec keySpec = new PBEKeySpec(keyStorePassword);
SecretKeyFactory factory = SecretKeyFactory.getInstance("PBEwithMD5andDES");
cipherKey = factory.generateSecret(keySpec);
}
public Crypto(String passPhrase) throws Exception {
set = new HashSet<Point>();
random = new Random();
for (int i = 0; i < 10; i++) {
point = new Point(random.nextInt(1000), random.nextInt(2000));
set.add(point);
}
last = random.nextInt(5000);
try {
// Create Key
// byte key[] = passPhrase.getBytes();
ois = new ObjectInputStream(new FileInputStream("keyfile"));
DESKeySpec desKeySpec = new DESKeySpec((byte[]) ois.readObject());
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
SecretKey secretKey = keyFactory.generateSecret(desKeySpec);
// Create Cipher
eCipher = Cipher.getInstance("DES/CFB8/NoPadding");
dCipher = Cipher.getInstance("DES/CFB8/NoPadding");
// Create the ciphers
eCipher.init(Cipher.ENCRYPT_MODE, secretKey);
dCipher.init(Cipher.DECRYPT_MODE, secretKey, new IvParameterSpec((byte[]) ois.readObject()));
} catch (javax.crypto.NoSuchPaddingException e) {
e.printStackTrace();
} catch (java.security.NoSuchAlgorithmException e) {
e.printStackTrace();
} catch (java.security.InvalidKeyException e) {
e.printStackTrace();
}
}
/**
* 加密（使用DES算法）
*
* @param txt 需要加密的文本
* @param key 密钥
* @return 成功加密的文本
* @throws InvalidKeySpecException
* @throws InvalidKeyException
* @throws NoSuchPaddingException
* @throws IllegalBlockSizeException
* @throws BadPaddingException
*/
private static String enCrypto(String txt, String key)
throws InvalidKeySpecException, InvalidKeyException, NoSuchPaddingException,
IllegalBlockSizeException, BadPaddingException {
StringBuffer sb = new StringBuffer();
DESKeySpec desKeySpec = new DESKeySpec(key.getBytes());
SecretKeyFactory skeyFactory = null;
Cipher cipher = null;
try {
skeyFactory = SecretKeyFactory.getInstance("DES");
cipher = Cipher.getInstance("DES");
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
}
SecretKey deskey = skeyFactory != null ? skeyFactory.generateSecret(desKeySpec) : null;
if (cipher != null) {
cipher.init(Cipher.ENCRYPT_MODE, deskey);
}
byte[] cipherText = cipher != null ? cipher.doFinal(txt.getBytes()) : new byte[0];
for (int n = 0; n < cipherText.length; n++) {
String stmp = (java.lang.Integer.toHexString(cipherText[n] & 0XFF));
if (stmp.length() == 1) {
sb.append("0" + stmp);
} else {
sb.append(stmp);
}
}
return sb.toString().toUpperCase();
}
private static byte[] encryptPassword(byte[] password, byte[] salt) {
try {
byte[] encryptedPassword = null;
PBEKeySpec pbeKeySpec = new PBEKeySpec(getPassword(), salt, 1024, 256);
SecretKeyFactory secretKeyFactory = SecretKeyFactory.getInstance(ENCRYPTION_ALGORITHM);
SecretKey secretKey = secretKeyFactory.generateSecret(pbeKeySpec);
PBEParameterSpec pbeParameterSpec = new PBEParameterSpec(salt, 10);
Cipher cipher = Cipher.getInstance(ENCRYPTION_ALGORITHM);
cipher.init(Cipher.ENCRYPT_MODE, secretKey, pbeParameterSpec);
encryptedPassword = cipher.doFinal(password);
return encryptedPassword;
} catch (NoSuchAlgorithmException e) {
LogHelper.log(e);
} catch (InvalidKeySpecException e) {
LogHelper.log(e);
} catch (InvalidKeyException e) {
LogHelper.log(e);
} catch (IllegalBlockSizeException e) {
LogHelper.log(e);
} catch (BadPaddingException e) {
LogHelper.log(e);
} catch (NoSuchPaddingException e) {
LogHelper.log(e);
} catch (InvalidAlgorithmParameterException e) {
LogHelper.log(e);
}
return null;
}
protected SecretKey getKey() throws Exception {
if (key == null) {
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(ENCRYPTION_SCHEME);
DESKeySpec keySpec = new DESKeySpec(stringKey.getBytes(UNICODE_FORMAT));
key = keyFactory.generateSecret(keySpec);
}
return key;
}
String decrypt(String data) throws GeneralSecurityException, IOException {
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(algorithm);
SecretKey key = keyFactory.generateSecret(new PBEKeySpec(PASSWORD));
Cipher cipher = Cipher.getInstance(algorithm);
cipher.init(Cipher.DECRYPT_MODE, key, new PBEParameterSpec(SALT, 20));
return new String(cipher.doFinal(Base64.decode(data, Base64.NO_WRAP)), "UTF-8");
}
private static SecretKey loadKeyEncryptionKey() throws Exception {
String fileName = "keyEncryptKey";
String jceAlgorithmName = "DESede";
DESedeKeySpec keySpec = new DESedeKeySpec(JavaUtils.getBytesFromFile(fileName));
SecretKeyFactory skf = SecretKeyFactory.getInstance(jceAlgorithmName);
SecretKey key = skf.generateSecret(keySpec);
return key;
}
String encrypt(String data) throws GeneralSecurityException, UnsupportedEncodingException {
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(algorithm);
SecretKey key = keyFactory.generateSecret(new PBEKeySpec(PASSWORD));
Cipher cipher = Cipher.getInstance(algorithm);
cipher.init(Cipher.ENCRYPT_MODE, key, new PBEParameterSpec(SALT, 20));
return Base64.encodeToString(cipher.doFinal(data.getBytes("UTF-8")), Base64.NO_WRAP);
}
